Severe Thunderstorms in the Ohio Valley and Mid-Atlantic; Heat Continuing in the Central U.S.

Widespread strong to severe thunderstorms are expected from the Upper Ohio Valley into the Mid-Atlantic through Friday, with damaging winds as the primary threat. Dangerous heat will continue from the South-Central U.S. to the Midwest, Ohio/Tennessee valleys, and Mid-Atlantic. Widespread Major to Extreme Heat Risk is forecast into the weekend and will confine to the South-Central U.S. by Labor Day Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

83°F

28°C

Humidity 85%
Wind Speed Calm
Barometer 29.97 in (1015.8 mb)
Dewpoint 78°F (26°C)
Visibility 10.00 mi
Heat Index93°F (34°C)
Last update 3 Sep 9:56 pm EDT
Extended Forecast for

North Potomac MD

Severe T-storm Watch until September 4, 02:00am
Click here for hazard details and duration
Severe T-storm Watch
  •  
    Severe T-storm Watch until September 4, 02:00am

    NOW until 2:00am Fri

    Severe T-storm Watch

  • Tonight

    Low: 72 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: A chance of showers and thunderstorms after 3pm.  Increasing clouds, with a high near 90. Light west wind becoming northwest 5 to 9 mph in the morning. Winds could gust as high as 18 mph.  Chance of precipitation is 30%.

    High: 90 °F

    Sunny then
    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am.  Mostly cloudy, with a low around 70. Northwest wind 3 to 5 mph.  Chance of precipitation is 50%.

    Low: 70 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday

    Saturday: A chance of showers, mainly after 2pm.  Partly sunny, with a high near 83. North wind 5 to 7 mph.  Chance of precipitation is 30%.

    High: 83 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers before 8pm.  Partly cloudy, with a low around 63. Northeast wind 3 to 5 mph.  Chance of precipitation is 30%.

    Low: 63 °F

    Chance
    Showers then
    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 80.

    High: 80 °F

    Sunny

Detailed Forecast

Tonight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Calm wind becoming northwest around 5 mph. Chance of precipitation is 40%.
Friday
A chance of showers and thunderstorms after 3pm. Increasing clouds, with a high near 90. Light west wind becoming northwest 5 to 9 mph in the morning. Winds could gust as high as 18 mph. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 70. Northwest wind 3 to 5 mph. Chance of precipitation is 50%.
Saturday
A chance of showers, mainly after 2pm. Partly sunny, with a high near 83. North wind 5 to 7 mph. Chance of precipitation is 30%.
Saturday Night
A chance of showers before 8pm. Partly cloudy, with a low around 63. Northeast wind 3 to 5 mph. Chance of precipitation is 30%.
Sunday
Sunny, with a high near 81.
Sunday Night
Mostly clear, with a low around 60.
Labor Day
Sunny, with a high near 80.
Monday Night
Partly cloudy, with a low around 60.
Tuesday
Mostly sunny, with a high near 84.
Tuesday Night
Partly cloudy, with a low around 63.
Wednesday
Mostly sunny, with a high near 86.
Wednesday Night
Partly cloudy, with a low around 70.
Thursday
A slight chance of showers. Mostly sunny, with a high near 89. Chance of precipitation is 20%.
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ABOUT THIS FORECAST

 
Point Forecast:
North Potomac MD
 39.09°N 77.25°W (Elev. 348 ft)
7:53 pm EDT Sep 3, 2026
10pm EDT Sep 3, 2026-6pm EDT Sep 10, 2026
 
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Additional Resources

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